A STAR is optional---however if you chose to file a STAR.. your flight plan will include the STAR and you must file via the proper initial fix/ transition route as was stated...
STARS are designed to expedite traffic flow so if you choose "no STAR" then ATC will simply read the STAR routing for you and you still fly the STAR
Now in actuality you may REQUEST a deviation from the STAR with ATC, if doing so is beneficial to your operations, and ATC maybe more than happy assist you,...in that case it wont hurt to ask...but ATC will [if able] attempt to expedite your arrival ...with ATC never be afraid to ask,but don't try to be sneaky---not that you are---but in general
PA